Heat warning issued for Webb County and nearby South Texas counties

The National Weather Service issued a heat warning Thursday for Webb County and a broad stretch of South Texas, warning that dangerous heat and humidity could push heat index values to between 115 and 120 degrees during the afternoon.

The warning is in effect from noon to 8 p.m. Thursday, June 18, 2026. Forecast highs are near 104 degrees, and the hottest conditions are expected during the afternoon peak.

Areas affected

The warning includes Webb County and several surrounding counties in South Texas, including Bee, Duval, Victoria, La Salle, McMullen, Jim Wells, Live Oak and Goliad, along with nearby inland and coastal county zones covered by the National Weather Service alert.

Local coverage described the warning as part of a broader early-summer heat episode across South Texas, where forecasters said conditions could reach some of the hottest levels of the year so far.

Why it matters

The National Weather Service warned that heat-related illnesses can increase quickly when high temperatures are paired with high humidity. Heat index values in the 115 to 120 range can become dangerous for anyone spending time outdoors, especially outdoor workers, children, older adults and people without reliable cooling.

Officials urged residents to drink fluids, stay in air-conditioned places if possible, avoid direct sun, check on relatives and neighbors, and never leave children or pets in vehicles.

What comes next

The warning is scheduled to expire at 8 p.m. Thursday unless forecasters extend or update it later in the day. Local emergency officials could also issue additional cooling or safety guidance if conditions worsen or linger.